Seal of the grand master of the Knights Templar

The grand masters of the Knights Templar during the later 12th and the 13th century used a double-sided seal which showed a representation of The Dome of the Rock (or a circular dome of the Church of the Holy Sepulchre) on one side, and the order's symbol of two knights on one horse on the other side. This design is first attested as in use by Bertrand de Blanquefort, the order's sixth Grand Master, in 1158, forty years after its foundation.

Source: Wikipedia — Seal of the grand master of the Knights Templar (CC BY-SA 4.0)